The NE5532 is widely used in a variety of audio equipment and is popular in amateur radio practice. The NE5532 is a dual low-noise operational amplifier with a low operating current of 8mA, operating from a bipolar power supply with a voltage of ±5V … ±15V.
Function Block Diagram of the NE5532
As can be seen from the block diagram, the NE5532 circuit is equipped with output short circuit protection and diode protection for the input of the amplifier.
Specifications of the NE5532
- Architecture: Bipolar
- Number of channels (#): 2
- Total supply voltage (Min) (+5V=5, +/-5V=10): 10
- Total supply voltage (Max) (+5V=5, +/-5V=10): 30
- GBW (Typ) (MHz): 10
- Slew rate (Typ) (V/us): 9
- Rail-to-rail: No
- Vos (offset voltage @ 25 C) (Max) (mV): 4
- Iq per channel (Typ) (mA): 4
- Vn at 1 kHz (Typ) (nV/rtHz): 5
- Features: Standard Amps
- THD + N @ 1 kHz (Typ) (%): 0.002
- Operating temperature range (F): 32 to 158
- Output current (Typ) (mA): 38
- CMRR (Typ) (dB): 100
- Input bias current (Max) (pA): 800000
The excellent range of supply voltages of the NE5532 chip, a low level of distortion of its noise, a good rate of increase of the output voltage allows you to build based on this microcircuit various and interesting amateur radio designs.
NE5532 Pinout
Below is the pinout of the NE5532 chip:
Pin assignment of the chip:
- 1OUT – Channel 1 output
- 1IN- -Channel 1 inverting input
- 1IN+ – Channel 1 non-inverting input
- Vcc- – Negative supply voltage
- 2OUT – Channel 2 output
- 2IN- – Inverting input of channel 2
- 2IN+ – Non-inverting input of channel 2
- Vcc+ – Positive supply voltage
NE5532 Alternatives
The following chips may be referred to as analogs:
- AD826
- LM833
- LM6172
- OP275
- RC4558
- TDA1034
An Example of Using the NE5532
A wide range of power supply voltage NE5532, low distortion, low self-noise, high rate of output voltage rise allows you to build based on this chip a variety of ham radio devices.
Microphone Preamplifier
The microphone preamplifier described here is designed for a small electret microphone. The circuit of this preamplifier is very simple and based on available components.
The operational amplifier NE5532 provides about 30dB gain. This increase depends on the value of the resistors R3 and R4. If you want to be able to change the gain, simply replace resistor R4 with a 470K potentiometer with a 10K resistor in series. The total gain, in this way, can vary from 10 to 45 dB. The wires for the audio signal must be shielded.
As an electronic engineer, I am always looking for new ways to improve my designs. The NE5532 is a great way to do just that. This operational amplifier offers many benefits over other types, including a lower noise floor and higher bandwidth.
I decided to try out the NE5532 in my latest design and was not disappointed. The performance was exactly as advertised and the results were better than I had hoped for. I will definitely be using this operational amplifier in all of my future designs.